mandible anatomy radiology

In anatomy, the mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human facial skeleton. The mental protuberance at this junction forms the chin. CT results showed an irregularly marginated lesion with increased bone marrow attenuation, osteolysis, and involvement of the skin in all patients. Mandible fractures. Normally, the contents of the floor of mouth is quite distant from the alveolar crest. • A tube-like passage that extends from the mandibular foramen on the medial surface of the ramus of the mandible to the mental foramen. BACKGROUND AND PURPOSE: Bisphosphonates are drugs that decrease bone turnover by inhibiting osteoclast activity. frontal view of a zygomaticomaxillary complex fractur… 18 Atlas of Oral and Maxillofacial Radiology Sagittal Middle cranial fossa Zygoma Glenoid fossa Mandibular condyle Mastoid air cells Figure 2.22 Coronoid process of mandible Middle ear ossicles Facial nerve canal (mastoid segment) Stylomastoid foramen Mandibular foramen Angle of mandible Figure 2.23 The lateral pterygoid muscle inserts anteriorly on the neck of the condyle. On imaging ameloblastomas are usually bubbly multiloculated lesions (80%) often with extensive bony destruction ( Fig. Siéssere S, Hallak regalo SC, Semprini M, et al. It forms the lower jaw and holds the lower teeth in place. Can be divided into lower base and upper alveolar part; Has a mental protuberance anteriorly and inferiorly where two sides come together Mandible and temporomandibular joint. We have a separate article on radiographic positioning of the skull. Here we present a 3D interactive model of the jaw musculature of the American Alligator (Alligator mississippiensis). There are 20 deciduous teeth: 2 incisors, 1 canine, and 2 molars in each quadrant. The imaging area (field of view) was a cylinder with a height of 80 mm, diameter of 120 mm, and pixel size of 100 μm. This is an updated version of the 2007 article. The three most common fracture sites are the body ramus and condyle. Correlation was made with MR, CT, plain X-rays, clinical examination, and surgical findings when possible. Mandible Verticosubmental Projection The skull consists of 8 cranial bones and 14 facial bones. 4 265 The mandible is the largest and only moveable facial bone. for more anatomy content please follow us and visit our website: www.anatomynote.com. Lippincott Williams & Wilkins. The tooth sockets, called alveoli, open onto this surface. MATERIALS AND METHODS: This is a … An ameloblastoma is a benign, locally invasive neoplasm of odontogenic origin. periodontal cysts) are the most common odontogenic cysts ( Fig. A properly positioned radiograph of the face and mandible shows the relationship between the bony structures and soft tissues of the visualized anatomy. The mandible sits beneath the maxilla.It is the only movable bone of the skull (discounting the ossicles of the middle ear). It consists of a curved, horizontal portion, the body, and two perpendicular portions, the rami, which unite with the ends of the body nearly at right angles (angle of the jaw). According to the anatomy of mandible there are main 3 areas, Symphysis menti area Mandible body area Ramus area 4. The temporalis muscle inserts anteriorly on the coronoid process. Imaging. Patients with BPONJ typically present with tooth loosening and nonhealing extraction sockets. It contains the inferior alveolar vessels and nerve, from which branches are distributed to the teeth via the incisive nerve. 2.77 ). A break of the ring in one place will usually be accompanied by further break in the ring elsewhere. 3rd … In many cases, the clinical history alone is crucial in reaching a … In the atrophic mandible, however, the structures become relatively superficial. 2.81 ). They occur in the third and fourth decades of life, and are slow growing and painless. In anatomy, the mandible, lower jaw or jawbone is the largest, strongest and lowest bone in the human facial skeleton. Eighteen patients with abnormalities of the mandible and two normal volunteers were studied with MRI. ... Mandibular fractures of the body or angle of the mandible can be managed conservatively, unless they are displaced, in which case reduction and internal fixation may be required. Internal anatomy. Genial tubercles. Keratocystic odontogenic tumors are characterized by local aggressiveness and infiltration into surrounding tissues with a high rate of recurrence. DINESH DARSHANA RADIOLOGIC TECHNOLOGIST – SRI LANKA 2. Start studying Dental Hygiene Radiology Chapter 27 "Normal Anatomy" Mandibular. Radiology Schools. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Google+ (Opens in new window). Although a specific diagnosis of these can be difficult on imaging, it is important to be familiar with the key imaging characteristics of a few common entities and to be facile at detecting imaging signs of aggressive neoplastic, inflammatory, and infectious processes. Anatomy of the face and neck (CT) - interactive atlas of human anatomy using cross-sectional imaging This head and neck anatomy atlas is an educational tool for studying the normal anatomy of the face based on a contrast enhanced multidetector computed tomography imaging (axial and coronal planes). Mandible fracture - OPG (Same patient as image below) A fracture of the left mandible body is easy to see; On the right the cortical outline is difficult to follow at the base of the condyle (? The Mandible Radiology Key The Mandible Anatomy Structures Fractures Kenhub Surgical Anatomy Of Mandible Dept Musculoskeletal System Mandible Structure Muscular Attachments Anatomy Skull Tutorial 4 Mandible Anatomy Tutorial Mandible Radiology Reference Article Radiopaedia Org The Mandible Anatomy … Head & Neck Mandible & Maxilla 2. Radiology, normal anatomy of mandible. This should mean that the mandible should fracture in … The clinical features of mandibular fractures include malocclusion and loss of mandibular function. They travel through the mandibular foramen, into the mandibular canal, and exit at the mental foramen. {"url":"/signup-modal-props.json?lang=us\u0026email="}. The anatomy of the mandibular bone in primates, including humans (Iwanaga et al., 2016a), hamadryas baboons (Fukase, 2011), Macaca mulatta (Turpin, 1968), and New World monkeys (Takai et al., 2000) has been studied by many researchers. Coronoid process of the mandible: Appears as a triangular radio- opaque structure projected into the same general area of max periapical film projections distal to the maxillary teeth. Please refer to our article on condylar process of the mandible for a specific discussion, ADVERTISEMENT: Supporters see fewer/no ads, Please Note: You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Mandibular canal. Palpable swelling. Also known as the lower jawbone, the mandible is the largest and strongest bone of the face. Its superior border is the alveolar process. It is united to the temporal bone by a synovial joint and is the only mobile bone of the head, apart from the hyoid apparatus. The mandible is commonly injured in trauma, due to its prominent position and ring-like configuration. Association of Mandible Anatomy with Age, Gender, and Dental Status: A Radiographic Study RevantH.Chole, 1 RanjitkumarN.Patil, 2 SwatiBalsarafChole, 3 ShaileshGondivkar, 4 AmolR.Gadbail, 5 andMonalB.Yuwanati 6 Department of Oral Medicine and Radiology, Kalinga Institute of Dental Sciences, Bhubaneshwar, … The masseter muscle inserts on the outer surface of the ramus and the medial pterygoid on the inner surface. Apparent between the CT provides excellent bony detail regarding the mandible, and a Panorex – like image can also be reconstructed. A foramen refers to any opening through which neurovascular structures can travel. Abnormalities involving the marrow of the mandible can be assessed on MR by the use of fat suppressed T2-weighted scans, T1-weighted scans (with obliteration of the normal high signal intensity fatty marrow implying tumor invasion), and fat suppressed T1-weighted postcontrast imaging. The mandible has a large medullary core with a cortical rim 2-4 mm thick. … There are 32 permanent teeth: 2 incisors, 1 canine, 2 premolars, and 3 molars in each quadrant. Mandible is a U-shaped bone, formed by the fusion of two separate halves at the mental symphysis. Dental cysts can be either odontogenic (associated with tooth development) or nonodontogenic. This photo gallery presents the anatomy of pineal gland by means of MRI (T1-weighted sagittal, axial and coronal views). A properly positioned radiograph of the face and mandible shows the relationship between the bony structures and soft tissues of the visualized anatomy. SUMMARY: Mandibular actinomycosis is an uncommon disease. Mandible anatomy. Anatomynote.com found Mandible Anatomy … Harnsberger HR, Osborn AG, Ross J et-al. 2.82 ). United by its rostral extremity to the mandible of the opposite side, they constitute the lower jaw. Mandibular fractures are relatively common especially among young men. WWC Normal Radiographic Anatomy. The normal canal should measure approximately 6 mm and canals larger than this should be regarded with suspicion. In addition, this article has presented radiographic techniques used to diagnose these lesions. How does the website work? Although traditionally the mandible and base of skull are thought to form a complete bony ring interrupted only by the tmjs. Introduction. Anteriorly, the two halves of the mandible fuse at the mandibular symphysis. An association between the use of bisphosphonates and osteonecrosis of the maxilla and mandible has recently been described. Although the radiologic findings in some mandibular lesions may be non-specific, there are often clues for histologic diagnosis within the anatomy … Lack of mandibular rigidity (rubber jaw). He had no allergies and was not taking any medications. They can be associated with Marfan and Noonan syndromes. Cranial vault. The body of the mandible anchors the lower teeth and forms the chin. A variety of benign and malignant lesions occur within the mandible. The maxilla and mandible bones create the opening of the mouth. Tasked with holding the lower set of teeth in place, this bone has a symmetrical, horseshoe shape. Vital signs were wit… 285. Tap on/off image to show/hide findings. Facial Fractures The bones of the skull and face collectively make up the most complex area of skeletal real estate in the body. They are unilocular and surround the crown of an unerupted tooth ( Fig. Discover (and save!) The classes are divided according to Internships - Bodyparts - Techniques. This page includes the following topics and synonyms: Mandible Anatomy, Mandible, Jaw Anatomy, Temporomandibular Joint Anatomy, Temporomandibular Joint, Masticatory Muscles, Muscles of Mastication. STUDY. The remaining cortical shell was then grafted with a corticocancellous block of bone from the right fibula. A Panorex exam can miss subtle nondisplaced fractures, with CT advocated for optimal evaluation ( Fig. They appear as an expansile multi- or unilocular cyst (not associated with a crown or unerupted tooth) with undulating borders, cortical thinning, and root resorption often occurring near the third molar tooth. A bewildering variety of lesions occurs in the maxilla and the mandible. Diagnostic Imaging of Mandible & Maxilla 1. It is connected to the temporal bone … your own Pins on Pinterest The ramus ascends dividing into the coronoid process anteriorly and the condyle with its neck and head posteriorly. It is united to the temporal bone by a synovial joint and is the only mobile bone of the head, apart … In the United States, the mandible is the third most Although the radiologic findings in some mandibular lesions may be non-specific, there are often clues for histologic diagnosis within the anatomy surrounding each lesion. Palpable swellings. The lateral pterygoid at the condylar process the medial pterygoid at the posterior inferior ramus near the angle the temporalis at the coronoid process and the masseter at the ramus. Diagnostic and Surgical Imaging Anatomy. ... -Depressed area of bone located on the internal surface of the mandible, inferior to mylohyoid ridge, superior to lower border of the mandible ... Radiology: Anatomic Landmarks Radiograph It articulates with both temporal bones at the mandibular fossa at the temporomandibular joints (TMJ). Pain or difficulty opening the mouth. The parasymphysis extends from the midline to past the canine. In human anatomy, the facial skeleton of the skull the external surface of the mandible is marked in the median line by a faint ridge, indicating the mandibular symphysis (Latin: symphysis menti) or line of junction where the two lateral halves of the mandible typically fuse at an early period of life (1-2 years).It is not a true … Due to its ring-like configuration, 50% of mandibular fractures are multiple (usually two breaks) ( Fig. The branches of the sublingual and submental arteries are present anteriorly. 2009;58(5):209-15.. Marcuzzo AV, Å uran-brunelli AN, Dal cin E, et al. The mandible (Mandibula) is a flat bone, even and assymmetric, that gives implantation to the inferior teeth.. United by its rostral extremity to the mandible of the opposite side, they constitute the lower jaw. Mandible oblique Anatomy 3. Panoramic radiography is usually limited to isolated lesions, whereas computed tomography is the tool of choice for all other facial traumatic … Fissural cysts are the most frequently encountered nonodontogenic cysts, the most common being the nasopalatine duct cyst (incisive canal cyst), with some cysts attaining sizes of 2 to 3 cm. Can be divided into lower base and upper alveolar part; Has a mental protuberance anteriorly and inferiorly where two sides come together; Mental spine: rough projection on inner surface of body in the midline The mandible is the only bone in the skull that is mobile. It is the moving part of the jaws when the body is engaged in the feeding process and for that reason all the muscles of mastication including the medial and lateral pterygoid muscles, the temporal muscle and the masseter muscle attach to it. Mandible anatomy. Themental foramenis positioned on the external surface of the mandibular body, below the second premolar tooth. Trauma with suspected fracture and symphyseal split. Dentigerous (follicular) cysts are the next most common odontogenic cyst. MR typically manifests low T1 and high T2 signal intensity, with lesion enhancement. Analysis of the fractured face requires a knowledge of not only normal anatomy, but also of common fracture patterns in the face. … Hover on/off image to show/hide findings. The mandible is a singular bone that has a distinctive horse-shoe shape and is symmetrical on both sides. Axial Ct Anatomy Images Radiology Brain Anatomy Hello, What's up guys? ... M. MiljavecSpontaneous bone healing of the large bone defects in the mandible. The ramus is quadrilateral in shape, and has two surfaces, four borders, and two processes and one canal: The mandibular canal runs obliquely downward and forward in the ramus, and then horizontally forward in the body, where it is placed under the alveoli and communicates with them by small openings. ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. CT demonstrates mixed sclerotic and lytic changes and occasionally pathologic fractures ( Fig. Anatomy: The Mandible. Key fea … In this review we present the normal axial and coronal anatomy … Mandible Verticosubmental Projection; The skull consists of 8 cranial bones and 14 facial bones. Dental malocclusion. PLAY. A 39-year-old male with history of dyslipidemia presented to the clinic complaining of progressively worsening right jaw pain, clicking, and “jaw shifting.” The patient stated that the pain had begun in 2003, but had progressively worsened over the years and was now accompanied by headaches and the inability to close his jaw on the right side. It begins as 2 sepa-rate bones and unites anteriorly when a child approaches 1 year of age.1 Its unique shape causes it to fracture easily, typi-cally in more than 1 place. Patients typically experience painless swelling ( , 8 ); palpation may elicit tenderness, and there is frequently expansion of bone and displacement of teeth ( , 1 ). Mandibular fractures are among the most common maxillofacial fractures observed in emergency rooms and are mainly caused by road accidents. The mandible is the single midline bone of the lower jaw. Mohamed Zaitoun Assistant Lecturer-Diagnostic Radiology Department , Zagazig University Hospitals Egypt FINR (Fellowship of Interventional Neuroradiology)-Switzerland zaitoun82@gmail.com 3. On arriving at the incisor teeth, it turns back to communicate with the mental foramen, giving off two small canals which run to the cavities containing the incisor teeth. attachment site for the genioglossus and geniohyoid muscles; located on the lingual aspect on body of mandible at the midline. Probably the most common facial fracture is the tripod or zygomaticomaxillary complex fracture, so called because it involves separation of all three major attachments of the zygoma to the rest of the face. Cysts of the jaws are classified into two categories: odontogenic and nonodontogenic. TT Taylor, SI Gans, EM Jones, AR Firestone, WM Johnston, D-G Kim, Comparison of micro-CT and cone beam CT-based assessments for relative difference of grey level distribution in a human mandible, Dentomaxillofacial Radiology, 10.1259/dmfr/25117764, 42, 3, (25117764), (2013). Surgical anatomy of the marginal mandibular nerve: a systematic review and meta … Ameloblastomas have a tendency to break through the cortex with formation of a soft tissue mass. Figure 3a: mandible at birth (Gray's illustrations), Figure 3a: mandible in childhood (Gray's illustrations), Figure 3c: mandible in adulthood (Gray's illustrations), Figure 3d: mandible in adulthood edentulous (Gray's illustrations), Figure 4a: mandible muscle attachments (Gray's illustration), Figure 4b: mandible muscle attachments (Gray's illustration), superior longitudinal muscle of the tongue, inferior longitudinal muscle of the tongue, levator labii superioris alaeque nasalis muscle, superficial layer of the deep cervical fascia, ostiomeatal narrowing due to variant anatomy, hollowed for reception of teeth (normally 16), rounded, longer than the superior border and thicker in front than behind, groove for the facial artery may be present at the point it joins the ramus of the mandible, thick, straight and continuous with the inferior border of the body of the mandible, thick, smooth, rounded and covered by the, angle of the mandible is at its junction of the posterior border and the body, thin above and thicker below; continuous with the oblique line, consists of the coronoid process anteriorly and the condylar process posteriorly separated by the mandibular notch (a.k.a. We are pleased to provide you with the picture named Mandible Anatomy Internal View.We hope this picture Mandible Anatomy Internal View can help you study and research. • Runs just inferior to the roots of the mandibular molars • Contains the inferior alveolar nerve, inferior alveolar artery, and inferior alveolar vein. Motor vehicle accidents and assaults are the primary causes of injury, and specifically fracture. It consists of a curved, horizontal portion, the body, and two perpendicular portions, the rami, which unite with the ends of the body nearly at right angles (angle of the jaw). Inability to close mouth (neurapraxia, open-mouth jaw locking). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Cystic lesions appearing in the maxilla and mandible have been shown with their typical radiographic features. Introduction. Unpaired bone of lower jaw; Largest and strongest bone in face; Articulates with temporal bone at temporomandibular joint; Consists of Body Anatomy of Mandible. Dental malocclusion. tiny hole in the bone surrounded by genial tubercles, located at the midline. The mandible is the single midline bone of the lower jaw. The inferior alveolar canal begins at the mandibular foramen and courses inferiorly, anteriorly, and toward the lingual surface in the ramus. ... we could only estimate where they are with the information obtained from human cadaver dissections or other imaging studies. This study describes the imaging findings of bisphosphonate-associated osteonecrosis of the jaws. Fractures involving the body may traverse the inferior alveolar canal, which runs from the mandibular foramen to the mental foramen, and can impair function of the inferior alveolar nerve (a branch of the mandibular [CN V3] nerve) resulting in lip/chin numbness. Dental caries are commonly incidentally visualized on CT, whether performed for trauma involving the face or inflammatory disease involving the paranasal sinuses ( Fig. Minerva Stomatol. Mandible and maxilla oblique radiography 1. The mandible is divided into the body anteriorly and the ramus posteriorly, with the angle of the mandible interposed between. The mandible can be considered as an anatomical ring of bone, stabilised at each end at the temporomandibular joints. Although traditionally the mandible and base of skull are thought to form a complete bony ring, interrupted only by the TMJs. The mandibular symphysis is located in the midline, a point of fusion. Bisphosphonates inhibit osteoclast-mediated bone resorption and are standard treatment for skeletal-related manifestations of multiple myeloma, breast carcinoma, and other solid cancers. The ramus ascends dividing into the coronoid process anteriorly and the condyle with its neck and head posteriorly. Start studying Radiographic anatomy of the maxilla and mandible. Would you rather read more about general subjects concerning radiology; click on The … 2. Implant at the anterior mandible could be risky, if the arteries are damaged. In adults, the canal comes in close proximity to the roots of the third molar. the mandible and the alveolar crest, usually in the apex of the 2nd premolar. 2.80 ). It articulates with both temporal bones at the mandibular fossa at the temporomandibular joints (TMJ). We retrospectively reviewed 6 patients with pathologically proven mandibular actinomycosis who underwent both CT and MR imaging to evaluate the characteristic imaging findings. The maxilla comprises the upper jaw while the lower jaw is from the mandible. Developed by renowned radiologists in each specialty, STATdx provides comprehensive decision support you can rely on - Mandible and Maxilla Radiology Schools Radiology Student Anatomy Head Radiologic Technology Facial Bones Medical Imaging Medical Field Anatomy And Physiology Rad Tech. 43. The body of the mandible is curved, somewhat like a horseshoe, with two surfaces and two borders. After resection and removal of the involved mandibular segment and control of hemorrhage, teeth 34, 35, and 36 were extracted from the segment, and the convoluted vascular mass was curetted. Mandible anatomy radiology. Publicationdate 2016-01-15. Inability to close mouth (neurapraxia, open-mouth jaw locking). Trauma with suspected fracture and symphyseal split. It forms the lower jaw and holds the lower teeth in place. The mandible is marked by two foramina. The panoramic radiograph is the imaging study of choice for the evaluation of the odontogenic etiology of suspected vestibular and buccal space infections and is frequently the only imaging study that is necessary. Learn vocabulary, terms, and more with flashcards, games, and other study tools. In primary tumors of the mandible, MR was able to differentiate between solid and cystic le … Although it can involve either the mandible or maxilla, most are mandibular (80%). Gonial angle and antegonial region are important landmarks in mandible which is influenced by gender, age, and dental status. Fissural cysts are most commonly encountered in the fourth to sixth decades with surgical enucleation the treatment of choice. Body Anatomy of Mandible. The mandible is a singular bone that has a distinctive horse-shoe shape and is symmetrical on both sides.It is the moving part of the jaws when the body is engaged in the feeding process and for that reason all the muscles of mastication including the medial and lateral pterygoid muscles, the temporal … Jaw Anatomy Britannica The midline of the body is the mandibular symphysis fig. It serves as a conduit for the inferior alveolar nerve and inferior alveolar artery. ... the present study were to estimate the relevance of these variables in improving the healing of the hard tissues of the lower jaw. Palpable swelling. 2.83 ) such as a parasymphyseal fracture and associated contralateral subcondylar fracture. Osteonecrosis of the jaw (with that of the mandible most common) may be associated with osteomyelitis (due to dental infections), osteoradionecrosis in patients with prior radiation, metastatic disease, or with bisphosphonate use (bisphosphonate-related osteonecrosis of the jaw [BPONJ]). Reference • Harnsberger HR, Osborn AG, Ross JS, Moore KR, Salzman KL, Carrasco CR, Halmiton BE, Davidson HC, Wiggins RH. Angle fracture. Search. Anatomy of the maxillar and mandibular bone with teeth numbered Anatomy of the head and neck: how to view the anatomical labels This atlas is a comprehensive and affordable learning tool for residents and medical students and especially for radiologists and surgeons. Saved by Jeremy Enfinger. Anatomy 2.0 Anatomy and related pathology Erik Beek and Robin Smithuis Radiology department of the University Medical Centre of Utrecht and the Alrijne Hospital in Leiderdorp, the Netherlands. BPONJ is fluorodeoxyglucose (FDG) avid. It is well known that a human mandible has one mental foramen on … 2.78 ). Mandible and temporomandibular joint. sigmoid notch), thin, triangular eminence from the upper border of the ramus of the mandible, separated from the condylar process posteriorly by the mandibular notch, masseter muscle also inserts into its lateral surface. May 26, 2012 - This Pin was discovered by Jeremy Enfinger. Mandible anatomy radiology. A variety of benign and malignant lesions occur within the mandible. It is connected to the temporal bone by the temporomandibular joint. Themandibular foramenis located on the internal surface of the ramus of the mandible. It appears as a radio-opaque Spine that is recorded on radiographs Distal to the tuberosity of maxilla And extends downward. 78/No. Description. (2006) ISBN:1931884293. elevators, retractors and evertors of the upper lip, depressors, retractors and evertors of the lower lip, embryological development of the head and neck. The ramus meets the body at … His social history was non-contributory. It provides a survey (panoramic view) of the entire mandible and maxilla on a single image. Click image to align with top of page. The patient is under regular follow-up. Mandible fracture - OPG. Movement of the lower jaw … Anatomical variations of the mandibular nerve and its branches correlated to clinical situations. Radicular cysts (a.k.a. There was no reported trauma or recent travel. Anatomy. Modern imaging and dissemination methods enable morphologists to share complex, three-dimensional (3D) data in ways not previously possible. In regard to neoplastic disease, MR provides excellent assessment of extraosseous lesion extent, and is very sensitive to tumor invasion (of the mandible). Lack of mandibular rigidity (rubber jaw). ... Any athlete suffering a severe blow to the maxilla or mandible must be referred for appropriate imaging. These two bones work in sync for speaking, eating, and facial expression. We have a separate article on radiographic positioning of the skull. Mandible supports the lower teeth and provides attachment for muscles of mastication and facial expression. The mandible, or lower jaw, is the bone that forms the lower part of the skull, and along with the maxilla (upper jaw), forms the mouth structure.

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